[jira] [Created] (YARN-6396) Call verifyAndCreateRemoteLogDir at service initialization instead of application initialization to decrease load for name node

["zhihai xu (JIRA)" <ji...@apache.org>]

zhihai xu created YARN-6396:
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             Summary: Call verifyAndCreateRemoteLogDir at service initialization instead of application initialization to decrease load for name node
                 Key: YARN-6396
                 URL: https://issues.apache.org/jira/browse/YARN-6396
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: log-aggregation
    Affects Versions: 3.0.0-alpha2
            Reporter: zhihai xu
            Assignee: zhihai xu
            Priority: Minor


Call verifyAndCreateRemoteLogDir at service initialization instead of application initialization to decrease load for name node.
Currently for every application at each Node, verifyAndCreateRemoteLogDir will be called before doing log aggregation, This will be a non trivial overhead for name node in a large cluster since verifyAndCreateRemoteLogDir calls getFileStatus. Once the remote log directory is created successfully, it is not necessary to call it again. It will be better to call verifyAndCreateRemoteLogDir at LogAggregationService service initialization.



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